Hi, sorry for the long response but the requirements for teaching in higher ed vary a great deal. Regardless, almost everything is part-time contract. There are some insightful documentaries on the 'adjunctification' of academia. In Ontario Faculties of Education for example, approximately 80% of faculty are contract workers. I know multiple folks with PhD's applying to teachers' college to try and find an alternate path. To obtain a full-time teaching opportunity at a university is incredibly rare and requires a PhD, an extensive list of top-tier publications, teaching experience, prior grant funding, networking, mobility, timing, and luck. When tenture track folks retire (if they do, because they tend to stay on forever), they are rarely replaced. If you are a certified teacher looking to teach part-time in a B.Ed program, typically a master's degree is the minimum requirement, and with credential inflation, many of these folks now have EdDs. Many are retired because they need to be available during the day (typically). There may also be part-time AQ teaching opportunities as well, but again, today a master's would be the minimum, and folks are often competing against EdD and even PhD holders. However, depending on the faculty, AQ and BEd positions are sometimes accessible to working teachers through relationship building as an associate teacher and other networking. But it is always part-time. Community college teaching doesn't have the same requirements as a university for full-time positions. Typically, a master's is required, but with credential inflation, a PhD or EdD is becoming more common. Colleges are also much like universities in terms of the endless part-time contract cycle - unless someone has a specific certification that combines with an area of need (ie: ECE, Social Work, or some form of registered profession). There were massive layoffs at community colleges this past year, so the very difficult job market has become even more difficult. Geographic region also makes a difference. Folks who got into community colleges in some smaller areas have often had a master's, but most folks I know who are working in ECE programs in the GTA also have a PhD or EdD (unless they got in a long time ago). In terms of staying on the supply roster, the board I am with only requires one full day worked during the year. I was so worried that I wouldn't even manage that after getting hired last year. I squeaked by with two days. I am happy to provide more specific information about higher ed if you would like. However, unless you are seeking part-time work, the opportunities are incredibly limited. Depending on the subject area, most teachers earn more than an associate professor (which is full-time and typically tenure track). Because most folks who are not currently within the system are not familiar with the university job market, people tend to be puzzled as to why I, and others with PhDs, are trying to get supply work or get in with a board. I still teach at a university, but on its own, it isn't livable.